What is CVE-2026-121292?

CVE-2026-121292 is a high-severity vulnerability in Arista Networks Eos, classified under Out-of-bounds Read. CVSS score: 8.2/10. Published 2026-11-10.

How severe is CVE-2026-121292?

High severity. CVSS v3 base score is 8.2 out of 10.

Out-of-bounds Read in Arista Networks Eos

CVE-2026-121292

A malformed Error Report can cause EOS to read beyond packet boundaries, potentially terminating the RPKI agent or exposing unintended memory contents through logging.

Vulnerability class: Buffer Overflow

Published 2026-11-10.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Arista Networks Eos — versions 4.37.0F

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

www.arista.com/en/support/advisories-notices/security-advisory/25044-security-a… (vendor-advisory)

Frequently asked questions

What is CVE-2026-121292?: CVE-2026-121292 is a high-severity vulnerability in Arista Networks Eos, classified under Out-of-bounds Read. CVSS score: 8.2/10. Published 2026-11-10.
How severe is CVE-2026-121292?: High severity. CVSS v3 base score is 8.2 out of 10.